Giles was the Assistant Administrator for the U.S. Environmental Protection Agency’s (EPA) Office of Enforcement and Compliance Assurance for all eight years of the Obama Administration.  In that role she led civil and criminal enforcement of the nation’s environmental laws, and implemented an innovative strategy for improving compliance and reducing pollution called Next Generation Compliance.

Cynthia Giles has more than 30 years of service in the public, private and non-profit sectors. She prosecuted civil violators of environmental laws as an Assistant United States Attorney in Philadelphia, led the water protection program for the Commonwealth of Massachusetts, served as the Director of Enforcement Coordination for EPA Region 3, and before returning to EPA, was the Director of the Conservation Law Foundation's Advocacy Center in Rhode Island, where she advocated for laws and policies to combat climate change and promote clean energy.

Giles has a BA from Cornell University, a JD from the University of California at Berkeley and an MPA from the Harvard University Kennedy School of Government.